function dateStringToDateTime(string, startYear) {
    let dateTime = [];
    let todoDate = new Date(string);
    dateTime.push(todoDate.getFullYear() - startYear);
    dateTime.push(todoDate.getMonth());
    dateTime.push(todoDate.getDate() - 1);
    dateTime.push(todoDate.getHours());
    dateTime.push(todoDate.getMinutes());
    return dateTime;
}

function dateTimeToDateString(dateTime, startYear) {
    if (!dateTime) return null;
    let year = dateTime[0] + startYear,
        month = dateTime[1] + 1,
        date = dateTime[2] + 1,
        hour = dateTime[3],
        minute = dateTime[4];
    return withData(year) + '-' + withData(month) + '-' + withData(date) + ' ' + withData(hour) + ':' + withData(minute) + ':00';
}

function withData(param) {
    return param < 10 ? '0' + param : '' + param;
}

function getLoopArray(start, end) {
    var start = start || 0;
    var end = end || 1;
    var array = [];

    for (var i = start; i <= end; i++) {
        array.push(withData(i));
    }

    return array;
}

function getMonthDay(year, month) {
    var flag = year % 400 == 0 || (year % 4 == 0 && year % 100 != 0),
        array = null;

    switch (month) {
        case '01':
        case '03':
        case '05':
        case '07':
        case '08':
        case '10':
        case '12':
            array = getLoopArray(1, 31);
            break;

        case '04':
        case '06':
        case '09':
        case '11':
            array = getLoopArray(1, 30);
            break;

        case '02':
            array = flag ? getLoopArray(1, 29) : getLoopArray(1, 28);
            break;

        default:
            array = '月份格式不正确，请重新输入！';
    }

    return array;
}

function getNewDateArry() {
    // 当前时间的处理
    var newDate = new Date();
    var year = withData(newDate.getFullYear()),
        mont = withData(newDate.getMonth() + 1),
        date = withData(newDate.getDate()),
        hour = withData(newDate.getHours()),
        minu = withData(newDate.getMinutes()),
        seco = withData(newDate.getSeconds());
	console.log(year, mont, date, hour, minu, seco)
    return [year, mont, date, hour, minu, seco];
}

function dateTimePicker(startYear, endYear, date) {
    // 返回默认显示的数组和联动数组的声明
    var dateTime = [],
        dateTimeArray = [[], [], [], [], [], []];
    var start = startYear || 1978;
    var end = endYear || 2100; // 默认开始显示数据

    var defaultDate = date ? [...date.split(' ')[0].split('-'), ...date.split(' ')[1].split(':')] : getNewDateArry(); // 处理联动列表数据

    /*年月日 时分秒*/

    dateTimeArray[0] = getLoopArray(start, end);
    dateTimeArray[1] = getLoopArray(1, 12);
    dateTimeArray[2] = getMonthDay(defaultDate[0], defaultDate[1]);
    dateTimeArray[3] = getLoopArray(0, 23);
    dateTimeArray[4] = getLoopArray(0, 59);
    dateTimeArray[5] = getLoopArray(0, 59);
    dateTimeArray.forEach((current, index) => {
        dateTime.push(current.indexOf(defaultDate[index]));
    });
    return {
        dateTimeArray: dateTimeArray,
        dateTime: dateTime
    };
}

module.exports = {
    dateTimePicker,
    getMonthDay,
    dateStringToDateTime,
    getNewDateArry,
    dateTimeToDateString
};
